| WebNameShort | |
| Cerataulus laevis [sensu] Rabenhorst 1864 |
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| Chaetoceros odontella (Ehrenberg) Rabenhorst 1864 |
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| Chaetoceros rogersii (Ehrenberg) Rabenhorst 1864 |
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| Cocconeis acutata Rabenhorst 1864 |
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| Cocconeis diaphana var. dirupta (Gregory) Rabenhorst 1864 |
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| Cocconeis placentula f. marina Rabenhorst 1864 |
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| Cocconeis placentula f. perpusilla Rabenhorst 1864 |
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| Cocconeis salina f. intermedia Rabenhorst 1864 |
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| Cocconeis scutellum var. mediterranea (Kützing) Rabenhorst 1864 |
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| Cocconeis scutellum var. punctata (punctatum) (Lobarzewsky) Rabenhorst 1864 |
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| Cocconeis scutellum var. stauroneiformis Rabenhorst 1864 |
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| Cocconeis tenuissima var. stricta Rabenhorst 1864 |
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| Cocconeis wigandii Rabenhorst 1864 |
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| Cocconema gibbum var. graecum (Ehrenberg) Rabenhorst 1864 |
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| Cocconema lanceolatum var. boeckii (Ehrenberg) Rabenhorst 1864 |
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| Cocconema lanceolatum var. cornutum (Ehrenberg) Rabenhorst 1864 |
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| Cocconema tumidum var. pachycephalum (Rabenhorst) Rabenhorst 1864 |
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| Cyclotella hilseana Rabenhorst 1864 |
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| Cymatopleura solea var. robusta Rabenhorst 1864 |
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| Cymbella cuspidata var. naviculiformis Auerswald in Rabenhorst 1864 |
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